Platform-scale



(NoModel.) 2 sheets-sheen 1.

A.. E. EMERY.

- PLATFGRM SCALE. Y No. 278,904. l Patented June 5,1883.

NVENTDR N. PCTERS. Phatofmhagmpher. wmmgson. D. C.

(No Model.) 2 sheets-sheet 2.

A. EBMERY..

PLATFURM SCALE.

No. 278,904;V Patented June 5, 1188s.

FIG.44

o8 aus sn am gl WITNEssEs NA Parras. Phuwuuwgmphef. washangwn. D4 t:4

. UNITED STATES PATENT OFFICE.

ALBERT H. EMEEY, OF NEW YORK, N. r., Assie'NOn TO THE EMERY sCALE.

COMPANY, or sTAMEOnD, CONNECTICUT.

PLATFORM-SCALE.

SPECIFICATION forming part of Letters Patent No. 278,904, dated June' 5, 1883.

i i Application filed February 5, 1881. (No model.)

T (all wil/0m it may concern:

Beit known that I, ALBERT H. EMERY, of the city, county, and State of New York, have invented certain new and useful Improvements in. Scales, of which the following is a specifi` cation. y V

This invention relates to platform-scales. The platf'orm is supported by a main lever, in form approximating to the letter A ,Y and sec;

1o ondary parallel levers connected therewith. The attachment ofthe levers to the bed, to the platform, and to each other is by thin iiexible plates. The platform vand levers are stayed longitudinally by exible plates connected at I5 their respective ends to the platform and to the bed and intermediately to the levers. The main lever is provided with stop-screws to prevent its- .lateral movement. It communicates with the weigh-beam through a bar contachment to the bed and to the weigh-beamA case. The connecting-bar is checked against horizontal motion by stop-screws set iu it, the 2 5 bed-frame, or the pillar. The weigh-beam case is constructed of' cast-iron flanged forat tachment to the pillar, and has suitable vsupports for the fulcrum attachments ofthe beam, and of asecondarybeam or indicator-rod work- 3o `ing in connection therewthand having greater angular motion. The weight end of the main beam and the fulcrum of the indicator are connected together and the said fulcrum to the main frame through the medium of springs 3 5 which are strained to the proper maximum load of the scale, but adapted to yield under excessive loading or under sudden shocks in either direction. The vertical motion of the main beam is limited in each direction by stopscrews applied within recesses in the beamcase and tapped into the said case and the beam, respectively. The lateral motion of the beam and indicator is also checked by stopscrews.

Heretofore platfornrscales have had their platforms and the loads to be weighed thereon supported sometimesl by hydraulic weighing apparatus, but usually upon levers connected by links, struts, knife-edges, fte., through 5o which levers the reduced loads -are carried to the weigh-beam or springs to measure their loads, or they have rested directly on coiled springs, or spring plates or bars, which, by their yielding. or bending, resist the load movement until such resistance of yielding or bend- 5 5 ing has used up or balanced the force of the load which caused it. Instead ot' knifeedges for fulcrums, I prefer to make use of' thin flexible plates, by which I am enabled to adopt very exact relations of' fulcrum distances, 6o and which plates are so thin, flexible, and elastic and have such slight motions that, while having -no friction, they offer very slight resistance to motion, which resistance is perfectly elastic and causes no irregularity in weighing.

In the accompanying drawings the invention is represented in eight views, numbered 40 to 4-7, inclusive. Figure 40 is averti cal lougitudi nal section of the platform, bed, and levers. 7o Fig. 41 is a plan of a part of" the bed and levers with the platform removed. Fig. 42 is a plan of the lower part of the scale on/a smaller scale, part of the platform being broken away. Fi

43 is a plan of the free end of the main plat- 75 form -lever, sh owi ng the adjustable stop -screws Fig. 44 is a verticallongitudinal section of the lower partof the enti re scale. Fig. 4.5, is an elevatiou ofthe upper part thereof, partly in section. Fig. 46 is a vertical longitudinalsee- 8O. tion, on a larger scale, of the weight end ol' the weigh-beam case, showing the end of the beam and its attachments in elevation.l Fig.

47 is a transverse section in the planes indicated by the lines 47, Fig. 46. S5

The platform 301 is shown connected by downwardly-proj ecting lugs and flexible plates 802 303 with the main lever 301k and second` ary levers 305, fulcrumed to the bed 306 by flexible plates at 307 and 308, respectively. 9o

are attached by flexible plates 311 to the main IOO lever 11i or llear ille lllid-lellgill 1li' ille plail'erlll. .It will 1l11w appear illz'lt as ille relative disiallees beiweell ille poillts 30T7 302, and Bil are equal ie ille disiallees beiweell tlle peillis $508, 303, 11l11l Sil, :l weigllt ell eiiller elld 01. 1111 ally part 11i' ille plail'erlll will llave ille sallle eii'eet 1111 ille lllalll lever 230i, illrollgll wlliell ille pressllre is eellllllllllieaied to tlle rod 0r bar 314).

231.2 are stop-serews tapped illte ille lever 304-, as sllewll ill Fi l2 11ll1ll371l111l abuttingagainst 11 lllg, 806, Figs. l2 alld 4l, wlliell prQjeeis dewllw1lld i'relll ille bed beiiweell ille peillis ei' said screws, i1) keep tlle i'ree elld el" ille lever i'relll lateral llleiiell be v11lld ille elastic lillliis 11il ille ilexible i'lllerlllll alld stay plaies.

'llle pillar 313 is eellsirlleied wiill ilallges :lll 315 11i beiielll alld top. By ille l'lalllge 314; :llld belts 31.6 it isii'asielledie ille bed 30G. T11 ille llallge $51115 ille weigll-bealll ease 3l l' is seellred by belts 31S.

319 represellis adjustable stell-screws tapped illi11 ille red 11rb1lr $310 lleal' its lewer elld, :llld ablliiillg agaillsi a` l'lllllge 1111 ille bed, ie ple velli ille balI i'r11lll lllevillg llerizelliallvbeyelld ille elasiie lilllii ei ille eelllleeii11g-plaie 530i). Said serews 111111', ii' prei'erredj be sei adjllsiabl'xv ill ille bed-'l'l'allle 111 ill ille pillzllr, ie l'erlll steps i`11r ille b11l'. Flexible si aix-plaies lllalv, il' preferred. be sllbsiiillied i'er i llese si11p-sere\\'s7 as llereillai'ier deselibed.

lll Figs. ll alld l5 ille pillar 31133 alld b111- Jlli) are sllewll as brekell 11nd ille appel-pari el' ille seale revelled llilleiyY degrees lrelll iis pesitiell ill przleiiee ie sllew 11 i'rollt view ei'tlle weigllbeallls alld illeir ease alld eelllleetiells.

552i) is all elasiie i'rieiiell brake, beztlillg agaillsi ille llalllge 1li' ille bed 01' aga-illsi ille illside 11il ille pillar 111' 11ille1- siaiiellalrv part7 alld alljllsied ill pressure b v a sei-screw, 23211, ie elleek ille i111) l'ree vel'iieal lllovelllellis 1li' ille paris, as 1l111 v be lleeessalwY ie brllg ille illdi eai'er 111li1'1kl'vi11 resi. All :lpeli lll-e is provided ill ille pillar 1li 322, ie adlllii 1111 illsirlllllellt l'er illrllillg ille sei-serew 821.

T11 seellre ille platforml i`re1ll lellgiilldilla-l lllevelllellt wiillellt prevelltillg iis l'ree vertical play, flexible bars 323, Figs. 4l), lil, l2, are previded, aiiaelled at 324 i1'1 tlle bed7 11t325i0l11gs pl'lljeetillg downward l'rolll ille plati'el'lll, alld at 321i i1) ille eelltral part ei'ille lllaill l'llatl'orlll lever Sill. Tlllese flexible bars 111l springs are 11llliiied ill Fig. ll. i

rllle weigll-bealll 32T is supported witllill iis ease b v 11` llexible Yl'lllerlllll -pl1llie, 328, alud is4 e111ll1eeie1'l i1) ille rod or bar 3l() b v 1l flexible iellsiell-pla-ie7 $329, betll aiiaelled io ille i'lllerllll'l-braekei 330, eollsiiilltillg ille lleel of ille bealll. ,llleI bealll ease is eellstrllei'ed witll 11 sllell', 32SY `l`01I ille reeeptiell 11i' weights 332, i0 be applied 11s required ie ille suspension red 5533, ill ellsiolllary lllallller. 'llle llztllger Sill 11i' ille red 333 is preierllbly eelllleeted io i-lle bracket 335 at ille exirelllii-y 11i' ille bealll by illill ilexible plaies 336, Figs. 416 and 4T.

Elastic eolllleetiolls are provided between ille weight elld 0i' the be11ll1 3271111d ille bracket 337 11i' ille illdie11i0r-r0d 5338, alld between ille indicator-red bracket' 111111 ille si alien-111')Y l'r1lllle er ease7 te take 11p ally sllddell slleek el: illlplllse ill eiillel.' direeiioll7 se as ill prevent illjllr;v or vielellee i0 ille paris. llll illis illllsirzliioll ille said ilexible eelllleeiiells are eellsil'lleted as l'lll` lows:

339 is a plaiesprillg7 seellred at iis eellter by :l serewvelalllp7 310, te ille bracket 335 at ille elld 1li' ille weigll-bealll7 alld extending l1liel' ally beyond said bracket, se '11s ie receive ai iis ellds reds 111.l plaies Bil, wlliell, illrollgll ille llledilllll et' elalllp-plaies H2 alld .ilexible plaies 3421, eelllleeil ii ie ille rear part 11i' ille illdielltel'- rod i'lllerlllll-braekei 33T. 'llle l'rellt ei'ille i'lllerlllll-braekei 33T is s1 "pellded by illill plaies 337, ela1ll} l-] ll1lies 33T", 1ll1d reds 111' plaies 5343 t0 ille extrellliiies et' 11 sp l'illg7 ill-l, wlliell is l'asielled7 by 1l elalllp7 S31-l5, 11i iis eellier7 te ille siaiiollary ease.

Set-serews 341i are elllple'ved ie keep 1l iellsiell 1111 ille sprillg equal te ille lllaxillllllll weiglli wlliellwill be sllsiailled b v ille illdieaiersred br1leket ill ille preper llse 11i' ille seale. 'llle sprillg "m .1.15) exel'is dewllwal'd straill 1111 ille llallgel's -il. 342 Bill ill eppesiiiell ie ille llpwal'd siralll et' ille springs ll. Seilserews 339, bearillg agllillsiA ille sprillg 533i). all'el'd 1l l l1lll'ii11ll \lY rigid eelllleeiiell beiweell ille weigllbealll alld illdieaterwllileille scale is `lll preper operaiiell. A sllddell dewllwardslleek 1111 ille 111' ille sllddell rellleval 11i' 1l lleal'y lead l'llllll tlle plailbrlll, will e11llse ille sprllgs Sill ie 'yield ie at'i'erd iillle Vl'er ille .lllevelllelli 11l` ille variells 'paris wiillelli illjllriells siraill. rllle sllddell dropping 1li' 1l lead 1111 ille plali'erlll elI rellloval el' 1l weiglli l'l'elll ille red 33353, eallsillg 1l lll11re sllddell llpwal'd 1ll11ii111l 11i' ille weiglli elld 11i' ille bealll illall ille ill1lieai11re1lll respelld ie, will ielllpelaril)Y separaie ille peilli's 11i' ille serews 33%) l'relll ille spl'illg 1i), ille said sprillg keeping ille llallgers ."-l-l ialli iill ille illdieatel llas iillle le llleve, :llld obviaiillg ille buckling el' ille plaies 342i.

A si-ol1-sel'ew, 34:6, tapped illie ille llaek 11i' ille ease, alld 11 silllilal' screw, 3447, ill ll-1111i, i1lpped illio 11 veriieal bal', IHS, beillg set ill elose proxilllt)v i11 ille bracket $535, seellre ille beilll1327 against l1lie11ll play. Sllerier serews T349 350 1lree11l1i1l0ye1'lie step ille illdieaior-l-ed bracket 33T against; lateral play.

Tlle vertical lllovelllellt 11i' ille weigll-bealll 321' is eell'iilled witllill proper lilllits by selsel'ews 352 passing` illrel'lgll apertures ill ille ease belleaill it. lllle screw 352, beingl passed loosely tllurellgll ille ease alld tapped illte ille betllll7 lilllitS ille upward lllevelllellt 11i' ille bealll by eollitlet 0i' ille serew-lleud wiill ille ease. Tlle sel-ew 353, being tapped illto ille ease, lillliiis ille deseellt Oi' ille bealll by iis e011- iaet with ille serelwpoilli. Tlle lleilds oi' ille screws are preferably illelosed `wiillill recesses ill tlle beallll-ease7 tls sllowll; blit illis is llet essential.

The indicator-rod ezlrres 1l b1ll1llleillg-ll'eiglli, 354, 11nd works witllill a guide7 355, 11nd ill front el :lll illdieaiolf-plaie, 356, wlliell guide IOC) and indicator may be made in one piece and attached to the heel-bracket 330 of the beam, as described in another application.

357 represents a sliding weight used in connection with the graduations shown at the upper edge of the beam l327 for ordinary weighing. y

To the beam is attached a rod, 358, carrying a smaller Weight, 359, for fractional weighing, in connection with. a second series of graduations on the beam. The weight-rod 353 also carries one or .more bal aneing and tare weights, 360. I

The thin fulcruin-plates employed,as above described, to connect the scale-levers are not intended to operate as resisting-springs. They are adapted to bend without appreciable resistance; but in operation they bend to a very slight and inappreciable extent. The invention is thus radically different from any in which scale-levers are connected by spring bars adapted to sustain the load by their re- ,silience Whatever novel subject-matter I have set forth and not claimed or attempted to claim herein I have claimed or attempted to claim in other applications or have reserved to be claimed in future originaliapplications.

The following` is here claimed as new:

1. The combination of the platform and its levers with thin iiexibl e plates 302 303, clamp ed 'to and directly connecting the said platform and levers, substantially as and for the purposes set forth. l

2. The combination of the iiexible stayplates 323 with the platform 301, platform-lever 304, and the frame or bed 306, substan-- tially as described.

3. The combination, with the platform-lever 304, of the adjustable stopscrews 312, abutting against the frame or one or more lugs thereon, as and for the purposes set forth.

4. In eombinationwith either or both levers 304E 305, and with the frame or bed ofthe scale 306, the thin iiexible plate fulcrums and their clamps, said flexible plate fulcrums offering such slight resistance that a small fraction of the full load ofthe scale will deflect the levers .to the full extent of their permitted movement.

278.904 l i l :i

5. In a platform-scale, the lever or levers having thin iexible plate fulcrums, in combination with weighing mechanism extraneous to said fulcrums.

6. In a scale, a platform lever or levers firmly connected to the weigh beam and secured against relative vertical motion at the points of connection by a rod or rods and thin plates, substantially as described.

7. The combination ofthe A-shaped platform-lcv er 304: and parallel secondary platformlevers 305, connected by thin flexible plate fulcrums olfering such slight resistance that a small fraction of the full load of the scale will defiect the levers to the full extent of their permitted movement, substantially as set forth.

8. The doubly-fianged hollow pillar 313, constructed as shown, and combined with the bed 306 and east-metal weigh-beam ease 317, substantially as and for the purposes specified.

9. In combination with the flanged pillar 313, the weigh-beam case 317, weigh-beam 327, and indicator-rod 333,with 'suitable connections, substantially as set forth.

10. The combination of the adjustable stopscrews 319 with the tension bar or plate 310 and any suitable stop o r abutment, substantially as and for the purposes set forth.

11. A weigh-beam or indicator-rod suspended bysprin gs strained to the proper maximum load, and adapted to yield under an excessive or sudden shock, substantially as set forth.

12. In combination with a scale-beam and a secondary beam or indicator rod connected thereto by hangers, the spring 339, adapted to keep said hangers constantly under tension and compensate for a sudden upward movement of the beam, substantially as set forth.

13. i The two adjustable stop-screws 353 352. screwed into the case or frame and the weighbeam, respectively, substantially as and for the purposes set forth.

14.. The adjustable stops 346 347 319 350, to prevent lateral motion of the scale-beam orindieator-rod, substantially as set forth.

ALBERT H. EMERY.

' lVitnesses:

OcrAvIUs KNIGHT, l MAnLoN RANDOLPH. 

